# A166997 (b-file synthesized from sequence entry)
0 1
1 0
2 12
3 56
4 5404
5 171664
6 193729840
7 36639136064
8 919064160383600
9 937227332865348224
10 699214061851483321467008
11 3577364560049979516493456896
12 93123865010226899737836259608990464